One day, a female teacher, Mio Kimishima, witnesses a colleague's teacher being stripped naked and tied up by a student in the school. Mio, who has a strong sense of justice, understands that she will be a substitute, and she masturbates naked in front of her students. After school the next day, she accompanies the apostle to the hotel, where she takes an aphrodisiac and is raped. However, her students' desires do not subside and she escalates to the point where she is tied up and made to cum in the classroom. Still, she was seriously trying to continue her class, and her students surrounded her and fucked her!
